British Prime Minister Boris Johnson tests positive for coronavirus

British Prime Minister Boris Johnson has tested positive for the coronavirus. 

The 55-year-old Johnson made the announcement Friday morning on Twitter.

"Over the last 24 hours I have developed mild symptoms and tested positive for coronavirus," Johnson tweeted. "I am now self-isolating, but I will continue to lead the government’s response via video-conference as we fight this virus. Together we will beat this. #StayHomeSaveLives."